ECMP/multipath support

[Joakim Tjernlund]

Ondrej Zajicek <santiago at crfreenet.org> wrote on 2010/12/21 00:22:26:
>
> On Fri, Dec 17, 2010 at 09:03:01AM +0100, Joakim Tjernlund wrote:
> > I don't remember all the details anymore but sharing IP address for numbered
> > ptp I/Fs is not pathological.
>
> Having two independent networks with the same IP prefix seems pretty
> pathological to me.

No, it works fine when you don't have real unnumbered. The only difference in
the extra entry in the router LSA for numbered PtP links.

In any case, if someone does it should just work. I don't recall OSPF says
it should not work.

>
> > It should just work. Also any combination of
> > numbered vs. unnumbered, IP address or no IP address(even pppd supports no IP address
> > on ptp links).
>
> You can really use ptp link without any IP address (in Linux)?

not me(yet) but look at pppd commit log
http://git.ozlabs.org/?p=ppp.git;a=commit;h=eee67a89b6e5703a54a21ef835c383c139ef76c3